Proposal and use of a void model for the simulation of inner fracture defect in drawing

In a previous paper [Komori K. Acta Mater 1999;47:3069], a new model of void coalescence, which was derived with reference to the Thomason model of void coalescence based on internal necking, was proposed and proved to be effective in the simulation of the drawing of copper. In this study, the simulation of the drawing of four kinds of carbon steel is performed using our proposed model. First, the two void shapes and two void configurations in our previous study are unified into one void shape and one void configuration to improve the proposed model. Then the analysis and the experiment of drawing are performed, and the validity of our proposed model is clarified by comparing the analytical results with the experimental results.